so...highest HP from a 3.1 MPFI ? ? ?

[1988GTU]

PM'ed you

[92_lumina]

Did not get it unless it takes time on here

[LeftVentricle]

a frind of mine (skalor if hes on this site) did a rough tune and not much changed from that

Ha! Skalor, crazy fellow. He's active on a-body.net, got an '89 Ciera International coupe with an L67, but it's got a 60-1 turbo instead of an M90. Purportedly making 376 hp at the wheels. I guess he'd know a thing or two about tuning.

[kuntzie]

yes he knows his stuff, i hit a 14.2@ 103 IIRC on a stock t25 in my car @ 11.5 psi, i bought this car off him in basically stock form minus a amaizing tune and 5-speed.

[93grandprix]

wow any more on your car?? i want to hear some pulls. if i may ask what did you do to your 3.1 and how much did it all cost? i have a 93 3.1mpfi

[kuntzie]

this is a factry turboi 3.1 motor, the bottom end is stock but the top end has been higly modified, i also have a custom ground cam. in tems of under the hood, there is oover 7k in mods (headers, x-over, turbo, BOV, wastegate, intercooler, intercooler piping, wide band o2 sensor/ controller (innovative) moates ostrich, cam, injectors, porting and polishing of heads/ intakes. ls6 valve springs

in tems of the car im around the 25 000 dollar mark

[93grandprix]

wow, a build like that is definitely not for the faint of heart. what kinda power could i expect if i did something similar, except without a turbo. 300+ horsepower would be too much for me anyway hahaha

[WrathOfSocrus]

I would love to replace my stock throttle body with something like that. Did you make it yourself? Probably a little out of my abilities to do myself. Great job!

Also, what rocker arms are going on top of those valves? The Crane gold race rockers are very nice but terribly expensive. There are other options though.

[montess408]

and where did you get your flandge's for your headers ? i am trying to build some headers and i can't find flandge's anywhere

[kuntzie]

its really not worth it to build a 3.1 up NA as a 3500 will be able to do so much better, i only kept with the stock casings because of the rairty of the car.

the tb is an FDP 62mm TB, no i didndt make it that would be crazy. i am using 1.6/1 rocekers from a 95 3100 sfi


the flanges i bought off of here.

[Superdave]

hey kuntzie, you never did answer my question about your valve springs.. it really looks like you have an install height problem there man...

[kuntzie]

the guy that did my heads installed/ got them, unsure but they seem to be fine

[Superdave]

the guy that did my heads installed/ got them, unsure but they seem to be fine

weird.. almost looks like he used the gen2 locks with the gen3 retainers.


either way, if it's working then it'll be fine.. lol

[93grandprix]

slightly off topic, but what kinda numbes could be seen on an n/a 3.1 with generally the same modifications done?

[3XTurboAgain]

a 3.1 without a turbo your looking at ... hmmmmm..... NOT ENOUGH